drop struct keyword for non-packed objects

As a style decision, struct is often used with packed structures to
indicate they are used like C-structs.  Cleanup this codebase to not use
the extra struct keyword throughout.

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I2f83bb1989e4d1f2f843ba3e45fb82e04f0fa61c
diff --git a/sensors/host.cpp b/sensors/host.cpp
index e05ac37..53f114e 100644
--- a/sensors/host.cpp
+++ b/sensors/host.cpp
@@ -86,7 +86,7 @@
     std::lock_guard<std::mutex> guard(_lock);
 
     /* This doesn't sanity check anything, that's the caller's job. */
-    struct ReadReturn r = {_value, _updated};
+    ReadReturn r = {_value, _updated};
 
     return r;
 }